iRedMail
// Document IndexAttention
Check out the lightweight on-premises email archiving software developed by iRedMail team: Spider Email Archiver.
Relay host is a server which can accept your email and sent it out to the final destination for you.
To setup a global relay host in iRedMail, please append below settings in
Postfix config file /etc/postfix/main.cf (Linux/OpenBSD) or
/usr/local/etc/postfix/main.cf (FreeBSD):
relayhost = [relay_server]:25
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
smtp_sasl_auth_enable = yes
smtp_sasl_mechanism_filter = login
smtp_sasl_security_options = noanonymous
Note
You should relace relay_server above by the real server address. for
example:
relayhost = [37.61.54.158]:25
relayhost = [smtp.gmail.com]:25
For more possible values/formats, please check Postfix document: Postfix transport table format (transport).
Then write the username and password in /etc/postfix/sasl_password:
relay.server user:password
Run postmap and restart Postfix service:
postmap hash:/etc/postfix/sasl_password
service postfix restart
Attention
Sender dependent relay host is available in iRedMail-0.9.5 or later releases.
If your sender dependent relay host requires SMTP Authentication
If your sender dependent relay host requires SMTP Authentication, please
add one more Postfix parameter in /etc/postfix/main.cf (Linux/OpenBSD)
or /usr/local/etc/postfix/main.cf (FreeBSD):
smtp_sender_dependent_authentication = yes
Then add smtp username and password in file /etc/postfix/sasl_password
like below:
user@domain.com smtp_user:smtp_password
Don't forget to run postmap hash:/etc/postfix/sasl_password after
modified this file.
Since iRedAdmin-Pro-SQL-2.4.0 or iRedAdmin-Pro-LDAp-2.6.0, it's able to manage
per-domain or per-user sender dependent relay host in domain or user profile
page, under tab Relay. Screenshot attached.
For SQL backends, you can manage sender dependent relay host in SQL table
mailbox.sender_relayhost. We use MySQL for example below.
sql> USE vmail;
sql> INSERT INTO sender_relayhost (account, relayhost) VALUES ('@domain.com', '[mail.gmail.com]:25');
sql> USE vmail;
sql> INSERT INTO sender_relayhost (account, relayhost) VALUES ('user@domain.com', '[mail.gmail.com]:25');
For OpenLDAP backend:
senderRelayHost of domain account.senderRelayHost of user account.Sample LDIF data:
dn: domainName=mydomain.com,o=domains,dc=example,dc=com
senderRelayHost: [mail.gmail.com]:25
...
dn: mail=user@mydomain.com,ou=Users,domainName=mydomain.com,o=domains,dc=example,dc=com
senderRelayHost: [mail.gmail.com]:25
...
